著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "宮坂, 正治","The Thünen structure of agriculture in Japan, basing on gravity model : the collected scientific papers",,Moriyama Shoten,1995,宮坂正治全集,,4839418098,,https://cir.nii.ac.jp/crid/1130000794755048192